If they come out with a 13 nobody is going to buy a 13. Have to skip it and go to 14. I always wondered if modern highrise bldg. have a 13.
If I had a bunch of money, I would put a Rohloff on my LHT but I've studied it some and think I would need DT to do that. Or maybe a Troll. Then I would need new wheels also; handmade (well, I guess that's all you can get anyway but the front gotta match the back). I always liked my belt drive Harley Davidson so I might as well get the hacksaw and go at it on my frame...don't know if that modification is being done (well) or what it would cost. I'm sure some would say go custom frame but I don't know enough about it to compare costs. I've looked at the cyclemonkey website but I don't get too much from it.
After you buy the hub, I see much additional outlay of $$$ for cables, misc. stuff and especially shifters depending upon your bike and bars. What about running those cables...I could see problems with that.
If I had a crystal ball I would say that things like Rohloff are the future of bicycles along with belt drive. I won't bet money on it but all those Harley riders said the exact same thing about belt vs. chain drive way back when.